Boring-machine.



. No. 894,228. PATENTED JULY 28, 1908.

W. D. PRICE, J. A. DREHER 6L A. E. WELKER. I

BORING MACHINE.

APPLICATION FILED DEO. 7, 1905.

i l y/7 HUIIMIP UNITED STATES PATENT OFFICE.

WALTER D. PRICE, JULIUS A. DREHER, AND ARTHUR E. WELKER, OF CLEVELAND, OHIO.

BORING-MACHINE Specification of Letters Patent.

Patented Jury 28, 1908.

To all whom it may concern:

Be it known that we, WALTER D. PRICE, JULrUs A". DREHER, and ARTHUR E. WELKER, citizens' of United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Boring-Machines, of which the following is a specification.

Our invention relates to improvements in boring machines, and refers more particularly to a machine for use in boring holes through joists to permit the passage of steam or other pipes, or for use for similar purposes where the working space is limited.

One object of the invention is the provision of a device of the character set forth which can be quickly adjusted and placed in positionpfor use and which will be automatic or self feeding in operation.

Other objects are to provide a boring machine which will be simple and durable in construction and which will be every particular.

Vit-h these and other objects in view, our invention consists of a boring machine comprising a cylindrical member formed with a head adapted to receive a drill or auger, an operating lever having ratchet connection with said head, a telescoping member within the cylindrical member, a coiled spring within the cylindrical member tending to force the telescoping member outward, and means for locking the telescoping member in closed position.

Our invention further consists in certain other novel features of construction, combination and arrangement of parts substantially as disclosed herein.

Figure l, is a side elevation of our improved boring machine. Fig. 2, is a longitudinal sectional viewfof the same, parts being shown in elevation. Fig. 3, is an end view of the device showing the pawl and ratchet mechanism, theauger being removed. Fig. 4, is a side elevation on a reduced scale of the device in operative position between two joists.

Referring to the drawings: The numeral 1 designates a cylindrical barrel or tube which is provided at one end with a head 2. An annular'shoulder 3, is formed on the head a short distance from the end thereof and a square opening 4, extends through the head for the reception ofthe shank 5, on the auger 6. A set screw 7, is secured in the head and serves to hold the auger at the required practical in length. A collar 8, fits over the head and abuts against the annular shoulder 3 thereon, and the collar or sleeve is loosely held in place by means of the screw ring 9. The

` sleeve S, is formed'integral with or secured to a handle lever l0, and the lever is formed near its junction with the sleeve, with extensions or ears 11, between which is pivotally secured the pawl 12. The inner end of the pawl extends through a slot 13, formed in the sleeve, and engages the ratchet teeth 14, formed on the head. These teeth are countersunk on the head so as to not interfere with the free movement of the sleeve. A spring 15, is secured on the lever and acts on the outer end of the pawl to force it into y engagement with the iratchet teeth. The outer end of the pawl is conveniently accessible so that the pawl may be released from engagement with the ratchet teeth when desired.

Fitting loosely within the tube or barrel 1, is a tube 16, provided at the outer end with a screw cap 17, having a conical bearing-point formed on the outer face thereof. The tube 18 is adapted to telescope Within the larger tube and a coiled spring 19 is entirely inclosed within the tubes. A bayonet slot 20, is formed in tube 1, and in this slot fits the lug or pin 21, secured to the telescoping tube 16, so that the movements of the telescoping tube are limited to the length of the bayonet slot.

As before stated, our device is particularly adapted for use in boring openings in joists and in this capacity is illustrated in Fig.- 4. To place the tool in position between the joists 22, the telescoping tube is compressed until it becomes locked in the vbayonet slot. The point of the tool is brought into contact with the material to be bored and when the proper angle has been determined, the telescoping tube is released and the bearingpoint comes into engagement with the adjacent joist. It is then simply necessary to work the ratchet lever in the ordinary way as the spring automatically feeds the auger forward. The coiled spring surrounds the inner extended end of the auger shank and in this and for the purposes stated which is practical and efficient in every particular.

We claim:

1. The combination with a barrel and a telescoping tube therein, provided with a screw cap'formed with a bearing oint, a spring in the barrel and means for imiting the movement of the tube, of a head on the barrel formed with ratchet teeth and adapted to receive a boring tool a screw in the head for securing the boring tool, a lever having a sleeve fitted over said head and provided with a spring pressed pawl to engage the ratchet teeth, 'and a screw ring on the head for securing the sleeve thereon.

2. The combination with a barrel and a telescoping tube therein, a screw cap on the tube provided with a bearing point, a spring in the barrel, bayonet and slotl connection between the tube and barrel for limiting the movement oi the tube, the barrel formed with a head having ratchet teeth and a screw carried by the head for securing the boring tool therein, a leverr having a sleeve fitted I over said head and provided with a pawl to engage the ratchet teeth, and a screw ring on the head for securing the sleeve thereon.

3. In a boring machine, the combination with a barrel having a head formed on one end provided with ratchet teeth, a telescoping tube within the barrel carrying a lug en-` with a barrel having a head formed at one end adapted to receive a boring tool, a clamping screw mounted in the head to engage the tool, said head formed with ratchet teeth and provided with annular collar, of a lever having a sleeve adapted to t over the head, a pawl carried by the lever to engage the teeth, a screw ring mounted on the head to secure the sleeve in abutment with the annular collar, a telescoping tube in the barrel, a screw cap to the tube provided with a bearing point, ya lug on the tube engaging a bayonet slot in the barrel, and a spring confined within the barrel and tube.

5. A boring tool comprising a barrel formed with a head at one end, an annular shoulder on the head, ratchet teeth on the exterior oi the head, said head formed with an opening to receive a tool shank, a clamp(- ing screw in the head to engage a tool shan a lever formed with an integral sleeve fitting over the head, a spring pawl pivoted between ears on the lever and passing through an opening in the sleeve to engage the ratchet teeth on the head, a screw ring on the end ofV the head to confine the sleeve against the annular shoulder, a longitudinal bayonet slot in the barrel, a telescoping tube in the barrel having a lug engaging the bayonet slot, a

spiral spring conned in the telescoping tube and barrel and surrounding the tool shank,

and a screw cap on the end of the telescoping tube formed with a conical bearing point.

In testlmony whereof we aliCiX our signatures 1n presence oi two witnesses.

Witnesses W. E. MINOR, HARRY A. BLISS. 

